Pitman arm for looms



Aug. 14, 1934. c -rug 1,970,185

PITMAN ARM FOR LOOMS Filed Jan. 19, 1934 2 Sheets-Sheet l f -f I: Q N Q n a O Inventor Atto'mey Aug. 14, 1934. c -rug 1,970,185

PITMAN ARM FOR LOOMS Filed Jan. 19, 1954 2 Sheets-Sheet 2 Inventor Attorney Patented Aug. 14, 1934 UNETED STATES PATENT ()FFICE 1 Claim.

This invention appertains to new and useful improvements in pitman arms, and more particularly to a pitman arm for various kinds of looms.

The principal object of the present invention is to provide a spring pitman arm which will prevent the breaking of the sword, as when the loom slams off, the spring takes up the shock.

Other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings:-

Figure 1 represents a side elevational view of the pitrnan, showing a part thereof in section.

Figure 2 represents an edge elevational view of the pitman.

Figure 3 represents a cross sectional view taken substantially on line S3 of Figure 1.

Figure 4 represents a perspective view of the slotted frame for the small end of the pitman.

Figure 5 represents the elongated block.

Referring to the drawings wherein like numer als designate like parts, it can be seen that numeral 5 represents the sword engaging frame of the pitman and this is of U-shape and provided at its ends with laterally disposed foot portions 66, each provided with an opening and these foot portions are opposed to the foot por- 7-7 of the frame 8 which at its bight o9 portion engages the usual crank shaft (not shown). This frame 8 is of U-shape, as shown in the drawings, and receives the enlarged end portion of the elongated tapering block 9, the small end of which is grooved, as at 10, to accommodate the sword, while its opposite end portion is provided with a projection 11 to engage into the end convolutions of a coiled, compressible spring 12. A short block 13 is provided in the frame 8 adjacent the bight thereof 0 and this block is grooved, as at 14, to accommodate the usual crank shaft (not shown). This block 13 is also provided with a projection 15 which engages into the opposite end convolutions of the spring 12. Thus the spring is suitably supported between the blocks 9 and 13.

The block 13 is provided with a slot transversely therein for receiving the bolt 16 which extends through the frame 8, whereby the block 13 will have some degree of freedom to move on the bolt 16 against the tension of the spring 12.

The frame 8, adjacent its feet '7'7, is provided with slots 17-47 for accommodating the bolt 18 which extends transversely through the enlarged end portion of the block 9.

The frame 5 is also provided with slots 19- 19. These slots 19-19 receive the bolt 20 which extends transversely through the block 9 adjacent its reduced end.

The apertured feet 7-7 and 66 are connected by the bolts 21 and the jamb nuts 22 thereon.

Obviously, the tension of the spring 12 and the length of the pitman can be minutely adjusted and when properly adjusted, the pitman will, in any event, take up any shock occasioned by slam-off action of the loom.

While the foregoing specification sets forth the invention in specific terms, it can be seen that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:-

A pitman comprising a pair of U-frames, adjustable means for connecting the ends of the U-frames, filler blocks in the frames, pin and slot connections between one of the blocks and both of the frames, the remaining block having a slot therein, a cross member in one of the frames for disposition through said slot and on which said last mentioned block is slidable longitudinally in the frame, and a spring interposed between the opposed ends of the said blocks.

CURTIS M. PETTUS. 

